Ok you have two options.
First is to register for a new user and you will get new username and password.You will have to re-search all your contact one by one.
Second is to ask a friend or someone you used to communicate via skype your username and if possible for them to view your profile and see your email address that appears in their skype. After this you click on forget password and it will resend you your password reset ..
cheers.. uttam

Register again, or click on the forget my password link,and it wil email you the information to your primary email adress you gave when you registered